Neutron-unbound states in {sup 25,26}F

Journal Article · Thu Sep 15 04:00:00 EDT 2011 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.84.037302· OSTI ID:21596799

Frank, N ^[1]; Albertson, D; Luther, B ^[2]; Bailey, J; Kasperczyk, M; Smith, A ^[3]; Baumann, T; Bazin, D; Schiller, A ^[1]; Brown, B A; Gade, A; Peters, W A; Thoennessen, M ^[1]; Brown, J ^[4]; DeYoung, P A ^[5]; Finck, J E ^[6]; Hinnefeld, J ^[7]; Howes, R ^[8]; Tostevin, J A ^[9]

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1. National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824 (United States)
2. Department of Physics, Concordia College, Moorhead, Minnesota 56562 (United States)
3. Physics Department, Illinois Wesleyan University, Bloomington, Illinois 61701 (United States)
4. Department of Physics, Wabash College, Crawfordsville, Indiana 47933 (United States)
5. Department of Physics, Hope College, Holland, Michigan 49423 (United States)
6. Department of Physics, Central Michigan University, Mt. Pleasant, Michigan 48859 (United States)
7. Department of Physics and Astronomy, Indiana University at South Bend, South Bend, Indiana 46634 (United States)
8. Department of Physics, Marquette University, Milwaukee, Wisconsin 53201 (United States)
9. Department of Physics, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford, Surrey GU2 7XH (United Kingdom)

Neutron-unbound states in {sup 25}F and {sup 26}F were populated via the reactions {sup 9}Be({sup 26}Ne,{sup 24}F + n) and {sup 9}Be({sup 26}Ne,{sup 25}F + n), respectively. A resonance close to the neutron separation energy in {sup 25}F was identified with a decay energy of 28{+-}4 keV. This resonance corresponds to an excited state in {sup 25}F at 4249{+-}116 keV assuming it decays to the ground state of {sup 24}F. Guided by shell-model calculations, a spin and parity of 1/2{sup -} can be assigned to this state. In the spectrum of {sup 26}F, which was produced in a nucleon-exchange reaction, there are indications for an excited state with a decay energy of {approx}270 keV.

• OSTI ID: 21596799
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 3 Vol. 84; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALINE EARTH ISOTOPES
ANGULAR MOMENTUM
BARYONS
BERYLLIUM 9
BERYLLIUM ISOTOPES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BINDING ENERGY
BOSONS
ELEMENTARY PARTICLES
ENERGY
ENERGY LEVELS
ENERGY RANGE
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
EXCITED STATES
FERMIONS
FLUORINE 24
FLUORINE 25
FLUORINE 26
FLUORINE ISOTOPES
GROUND STATES
HADRONS
ISOTOPES
KEV RANGE
KEV RANGE 100-1000
LIGHT NUCLEI
MATHEMATICAL MODELS
MESONS
MILLISECONDS LIVING RADIOISOTOPES
NEON 26
NEON ISOTOPES
NEUTRON SEPARATION ENERGY
NEUTRONS
NUCLEAR MODELS
NUCLEI
NUCLEONS
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
PARITY
PARTICLE PROPERTIES
RADIOISOTOPES
RESONANCE
SHELL MODELS
SPECTRA
SPIN
STABLE ISOTOPES